/*
 * Copyright 2013 Walter Lütgenau.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package offset.nodes.client.dialog.navigation.model;

import netscape.javascript.JSObject;

/**
 * Represents a javascript document.
 */
public class JSDocument extends JSNode {

    public static final String F_GET_ELEMENT_BY_ID = "getElementById";

    public JSDocument(JSObject object) {
        super(object);
    }
    
    public JSDocument(JSNode node) {
        this(node.getObject());
    }

    /**
     * Return the element denoted by this id or null.
     * 
     * @param id the element id
     * @return the element or null
     */
    public JSElement getElementById(String id) {
        Object result = getObject().call(F_GET_ELEMENT_BY_ID, new Object[]{id});
        if (result == null)
            return null;
        return new JSElement((JSObject) result);
    }

}
